The version of python-django-mptt in F25 is incompatible with the version of python-django in F25. I recommend rebasing F25 to the version of python-django-mptt in rawhide.
python-django-mptt-0.8.6-2.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-d3053b85bc
python-django-mptt-0.8.6-2.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-d3053b85bc
python-django-mptt-0.8.6-2.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.